Ways to gain a benefit from consuming someone (soul, body, mind, etc)?

[Reksew_Trebla]

So there is the Soul Gem method with Soul-Powered Magic feat. There is the Barbarian Rage Powers Bloody Fist -> Feast of Blood. There is the Tiefling Alt Fiendish Heritage #71. And there is the PrC Souldrinker.

Any other means of consuming someone for a benefit? I’m sure Dhampir has some ways through feats, but I don’t know which ones right now.

[VRMH]

Witches have the Cook People hex.